JP2684097B2 - How to paint / dry automobile bodies - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Objectives of the Invention (1) Field of Industrial Application The present invention relates to a vehicle body, and a door and a lid such as a hood to be attached to the vehicle body, which are separately coated. The present invention relates to a method for coating and drying an automobile body to be dried.

(2) Conventional Technology Conventionally, a vehicle body and lids are separately coated in the same topcoat booth and then dried, and the lids are assembled to the vehicle body after drying. There is one disclosed in Japanese Laid-Open Patent Publication No. Sho 62-157873, and like this one, if the body and the lids that have been coated and dried in the same topcoat booth are assembled together, the body and the lids There is an advantage that the hue can always be matched accurately.

(3) Problems to be Solved by the Invention However, even if the colors of the vehicle body and the lids are matched as in the above-mentioned conventional ones, if the painted surfaces of the vehicle body and the lids are not smooth and uniform, the overall The coating quality cannot be improved.

In this case, by coating and drying the lids in a horizontal posture, it is possible to avoid the influence of gravity as much as possible and obtain a smooth and uniform coated surface. However, the vehicle body is generally provided with a substantially vertical outer surface such as rear fenders and pillars that are press-molded integrally with the vehicle body.If the vehicle body is painted and dried in a horizontal position, the rear fenders and pillars will be painted. It was difficult to smooth the coated surface due to the gravity flow.

Therefore, there is also one in which the vehicle body is separated into its skeleton member and outer plate parts such as rear fenders, and the skeleton member and outer plate parts are separately coated (JP-A-63-107782). Although this can achieve smoothing of the painted surface of the rear fender, it is still difficult to smooth the painted surface of pillars.

Further, in the technology disclosed in Japanese Patent Laid-Open No. 63-178871, the painted surface of the vehicle body is smoothed by rotating the vehicle body with the lids attached to the vehicle body.
This requires a fixing work for surely maintaining the attachment state of the lids to the vehicle body regardless of the rotation operation, and it is difficult to automate the painting inside the vehicle body.

The present invention has been made in view of such circumstances,
An object of the present invention is to provide a coating method for an automobile body, which is intended to smooth the coating surface of the vehicle body and lids, and to automate the coating and facilitate the coating of the inside of the vehicle body.

B. Configuration of the Invention (1) Means for Solving the Problems According to the method of the present invention in order to achieve the above-mentioned object, an automobile body is provided with lids such as doors and bonnets to be attached to the body. In a method for coating and drying an automobile body, which comprises separately coating in the same topcoat booth and then drying, and then assembling the lids to the body body after the drying, the body body is a body body after the coating. While rotating around the horizontal axis, while
After the lids are coated so that the surface to be coated is horizontal, the lids are dried while maintaining their horizontal posture.

(2) Operation According to the above method, the body of the vehicle is rotated around the horizontal axis when it is dried after painting, so that the flow of the paint is suppressed and the painted surface is smoothed. By coating and drying with the coated surface horizontal, the effect of gravity is avoided and the coated surface is smoothed.

Moreover, since the body and the lid are separated and painted and dried separately, it is easy to automate the painting and drying, and the painting and drying inside the body can be done efficiently and accurately.

(3) Example Hereinafter, one example of the present invention will be described with reference to the drawings. First, referring to FIG. 1, the manufacturing of an automobile body is performed by four steps including a pressing step, a welding step WS, a painting step PS and an assembling step MS (not shown). The vehicle body 1 separately molded in the welding process WS and the lids 2 to be attached to the vehicle body 1 are formed along the main line 3 and the sub-line 4, respectively. Moving.

In the coating process PS, the pretreatment booth 5 and the draining drying furnace 6
, Undercoat booth 7, drying oven 8, sealer booth 9
A drying oven 10, a top coating booth 11, and a drying oven 12 are arranged in this order.

Further, in the assembling step MS, the first outfitting part 13 for outfitting the vehicle body 1 and the second outfitting part 14 for outfitting the lids 2 are installed in parallel.

By the way, when moving along the main line 3, the vehicle body 1
Are conveyed by the carriage 16 shown in FIG. That is, the rail 15 is laid along the main line 3, and the truck 16
Is movable on the rail 15. Thus, the carriage 16 is formed to be longer than the entire length of the vehicle body 1, and columns 17 and 18 are erected on both ends in the longitudinal direction. Moreover, trolley 1
The upper end portion of the front pillar 17 along the traveling direction 27 of 6 has a rotary shaft horizontal toward the rear side along the traveling direction 27.
A power source 20 such as an air motor having a protruding portion 19 is provided, and a rotation shaft 21 having the same axis line as the axis extension line of the rotation shaft 19 is provided at the upper end portion of the column 18 on the rear side along the traveling direction 27.
The base end of the is rotatably supported.

On the other hand, the rotary shaft 19 is provided at the front end of the vehicle body 1 in the front-rear direction.
A bracket 22 which is detachably attached to the tip of the vehicle is provided in advance, and a bracket which is detachably attached to the tip of the rotating shaft 21 is provided at the rear end of the vehicle body 1 along the front-rear direction.
23 are provided in advance. Therefore both brackets 22,2
By attaching 3 to the rotary shafts 19 and 21, respectively, and operating the power source 20, the vehicle body 1 is rotated about a horizontal axis along the front-rear direction.

Further, an endless chain 24 capable of traveling along the rail 15 for driving the carriage 16 is arranged below the carriage 16, and the chain 24 has an engaging portion provided on the lower surface of the carriage 16. A pusher 26 engaging with 25 is fixed. Therefore, as the chain 24 travels, the pusher 26 pushes the engaging portion 25, so that the carriage 16 or the vehicle body 1 moves forward along the traveling direction 27.

In FIG. 3, the lids 2 are the bonnet 2a,
A trunk lid 2b, a pair of left and right front doors 2c, 2d, a pair of left and right rear doors 2e, 2f, and a pair of left and right fenders 2g, 2h. These lids 2 are conveyed by a carriage 31 along a subline 4. It

The carriage 31 is capable of traveling on a pair of rails 32, 32 laid along the sub-line 4, and is driven to travel forward along the traveling direction 33 on the rails 32, 32 by a driving means (not shown). To be done.

Cylindrical columns 34, 34 are erected on the front and rear ends of the carriage 31 along the traveling direction 33. In the middle of these columns 34, four support arms 35, which protrude outward in the radial direction, are respectively provided at four locations vertically spaced from each other. A base end portion of a support shaft 36 is supported on each of the support arms 35 so as to be capable of a modest angular displacement of 90 degrees.
At the tip of 36 ..., the lids 2, that is, the bonnet 2a, the trunk lid 2b, the pair of left and right front doors 2c, 2d, the pair of left and right rear doors 2e, 2f, and the pair of left and right fenders 2g, 2h can be individually attached and detached. A support member 37 for supporting each of them is provided.

Explaining the operation of this embodiment, the parts obtained by pressing the steel plate in the pressing process are the welding process WS.
Then, the vehicle body 1 and the lids 2 are formed by being assembled with each other by welding or bonding with a thermosetting adhesive.

In the coating process PS, the lids 2 of the vehicle body 1 are combined with the pretreatment booth 5, the draining drying oven 6, the undercoating booth 7, the drying oven 8,
The sealer booth 9, the drying oven 10, the top coating booth 11 and the drying oven 12 are separately passed for coating.

Moreover, in the coating process PS, the vehicle body 1 is conveyed by the truck 31 while rotating by the operation of the drive source 20 in the drying oven 12 after passing through the top coating booth 11. The lids 2 pass through the topcoat booth 11 and the drying oven 12 in a horizontal posture with the surface to be coated, that is, the outer surface as the upper surface. In this way, when the body 1 is rotated at the time of drying after the overcoating treatment,
The flow of paint due to gravity is suppressed, and the painted surface is smoothed. In addition, by coating the lids 2 in a posture in which the surface to be coated is horizontal and then drying in that posture, the influence of gravity can be avoided and the coated surface can be smoothed.

Moreover, since the vehicle body 1 and the lids 2 are separated, the interior of the vehicle body 1 can be easily coated and the coating can be automated easily.

After the painting process in the painting process PS, the vehicle body 1 is on the first fitting part 13 of the assembling process MS, and the lids 2 are on the second fitting part 14 of the assembling process MS.
Are brought to each and are outfitted respectively. Then, the completed fittings of the lids 2 are attached to the vehicle body 1 after the fitting is completed, and the manufacturing of the vehicle body is completed.

C. Effects of the Invention As described above, according to the present invention, a vehicle body and lids such as doors and bonnets to be attached to the vehicle body are separately coated in the same topcoat booth and then dried, and the dried In the method of painting and drying an automobile body, in which lids are later attached to the body,
After this coating, the body of the vehicle is dried while rotating it around the horizontal axis, while the lids are coated with the surface to be coated horizontal and then dried while maintaining their horizontal posture. Therefore, the body of the vehicle is rotated around the horizontal axis when it is dried after painting, and the lids are kept in a horizontal position during drying, just like when painting. The flow of paint can be effectively suppressed and the coated surface can be smoothed.Because the body and lids to be combined after coating and drying were painted in the same topcoat booth, the body and lid are separated. Even if it is painted on, it is possible to always match the colors of both of them accurately, and as a result, it is possible to sufficiently enhance the coating quality of the body and lids as a whole and to make it uniform. That.

Moreover, since painting and drying are performed with the car body and lids separated from each other, it is easy to automate the painting and drying of the car body and lids, and the painting and drying inside the car body can be done efficiently and accurately. Can be done.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a manufacturing process diagram of a vehicle body, FIG. 2 is a diagram showing a configuration for transporting a vehicle body, and FIG. 3 is a configuration for transporting lids. FIG. 1 ... Body, 2 ... Lids, 2a ... Bonnet, 2b
...... Trunk lid, 2c, 2d, 2e, 2f …… door, 2g, 2h ……
Fender

Claims (2)

(57) [Claims] 1. An automobile body (1) and a lid (2) such as a door and a hood to be attached to the body (1) are separately coated in the same topcoat booth (11) and then dried. In the method for coating and drying an automobile body, wherein the lids (2) are assembled to the body body (1) after the drying, the body body (1) is formed by coating the body body (1) after the coating.
Is dried while rotating about a horizontal axis, while the lids (2) are coated with the non-painting surface of the lid being horizontal, and then dried while maintaining the horizontal posture as it is. Coating of car body
Drying method. 2. The lids (2) are doors (2c, 2d, 2e, 2).
f), bonnet (2a), fender (2g, 2h) and trunk lid (2b), the method for painting and drying an automobile body according to the above paragraph.